Removal of Microbial Contamination from Surface by Plasma

2017 International Conference on Advanced Environmental Engineering

生态环境科学

Feng, Xinxin^1 ; Liu, Hongxia^1 ; Shen, Zhenxing^1 ; Wang, Taobo^1

Department of Environmental Science and Engineering, Xi'An Jiaotong University, Shaanxi, China^1

关键词: Environmental health;    Escherichia coli (E. coli);    Microbial contamination;    Microbial inactivation;    Packing materials;    Plasma treatment;    Scientific principles;    Standard plate count;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/111/1/012012/pdf
DOI  :  10.1088/1755-1315/111/1/012012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Microbial contamination is closely associated with human and environmental health, they can be tested on food surfaces, medical devices, packing material and so on. In this paper the removal of the microbial contamination from surface using plasma treatment is investigated. The Escherichia coli (E. coli) has been chosen as a bio-indicator enabling to evaluate the effect of plasma assisted microbial inactivation. Oxygen gas was as the working gas. The plasma RF power, plasma exposition time, gas flow and the concentration of organic pollutant were varied in order to see the effect of the plasma treatment on the Gram-negative germ removal. After the treatment, the microbial abatement was evaluated by the standard plate count method. This proved a positive effect of the plasma treatment on Gram-negative germ removal. The kinetics and mathematical model of removal were studied after plasma treatment, and then the removing course of E. coli was analyzed. This work is meaningful for deepening our understanding of the fundamental scientific principles regarding microbial contamination from surface by plasma.